Trap cover and clamp



Oct. 16, 1928.

I H. G. ZIMMERMAN TRAP COVER AND CLAMP Filed June 8, 1927 mil Patented @ct, 1d, 1928:.

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Application filed June 8,

This invention relates primarily to improvemcnt in standard or regulation traps, and the obiect of th' *iventlon is to provide novel means or maiurl acturers of the trap without to the traps of all he side opening c ving the necess ty for using the threaded plug commonly employed for that pui use, w

Another object of the ii'ivcutionis to pro vide a device of the character stated above which will not interil' c with the usual prac tice oi? placing; these traps close against a side wall of the build) in which the pipe line of which this trap s a part is run.

A still further object of the invention is to provide a. closure device oii such form that it i y be readily altered to 1% dillerent sizes of tra p.

ln the accompanying drav-Jings:

Figure 1 shows a standard trap equipped with side closure aside in accordance with my invention;

T is a front elevation of the tzrap shown in Fig. 1', i

3 a view in perspective of the closure plate; v V i a r V y l l is a view in perspective of the rubber washer forming a part-oi? the device;

Fig. 5 is a view in perspective of the clan lin plate or screw;

ll is a trnsverse sectional view illustrafiiug a modi; ion of the device, and.

rc'rercnce to vthe drawings, 1 indi cates a standard or regulation trap equipped with the custoi sideopening in the lowest part. l t is customary to internal thread this side port 2 in order to porn the insertion i a threaded plug which con- 5 hides the us al cl sure. l; also customary tloi" di rcut maiuri acturers to form thiiir traps wit t sized openings and with dillerent tint,v requ the'use of their own 1 a cuiar closure pm and when r this plug: is lost lb is often or veuicly dii'iicu t to replace it By the present inventi the usua? threaded plug; is disposed of and a device provided which may he sell on any standard trap re irdless of the size of the opening 2,

" arly illus bar.

19%7. Serial No. mid l0.

-7, and a chain 8 is attached to the ends of the bar as clearly illustrated. One end of the chain 8 is provided with a hook S) whereby the chain detachable iiroiir an opening ll) at one end of the bar 7, whilethe opposite end of the chain is permanently ii ea in ancpehing 11 at the opposite end ofthe In connection with the device, I pro-- vide a rubber washer 12.

This device is applied as shown in Fig. 2 by placing the washer 12 over the opening and placing the convexed face of the closure plate 3 against the washer, the plate being held in the port-closing position by means of pressure exerted through the screw 5 in the bar 1 and the bar 7 being anchored to the trap l by means of the chain 8 which is passed completely around the trap, as clearly illustrated. Obviously by tightening the screw 5 against the closure plate 3, the latter may be forced with any degree of pressure required against the washer 12, thereby effectively sealing the opening 2. It will be noted that the chain 8 does not extend at the side of the trap l appreciably beyond the flange 13 at the top of the trap so that the latter may be placed as close to wall of a building as when the previous form of closure is used.

In order to accommodate this device to widely differing sizes of trap and opening, I so form the bar 7 that the end sections thereot may be easily broken away from the centersection, and at each end of the center section I provide an opening 14 which to get-her function after the same manner as he openi 15 5s 10 and 11 to hold the opposite ends of the retaining chain 8 when the outer sections of the bar are removed. In the present instance, the bar is weakened adjflTiIii] the ends grooves 15 on which the bar may be easily broken to remove the end sections. When smaller traps than that illustrated are used, therefore, these end sections may be broken away and the chain attached in the openrings 14, the bar otherwise functioning in the manner described. To accommodate the changes in the size of the opening 2, I also form the closure plate 3 with concentric grooves 16 and 17 on which the outer or per pheral portion, may be broke-a away to pro "vice a, plate oi the required smaller drfm by means of transverseill? the set screw 5.

sions to correspond with the relatively small clamping bar obtained by removing the end sections, as described above.

In Fig. 6, I have illustrated a modified form of clamp in which the chain 8 and bar 7 are replaced by a substantially L-shaped clamping bar 18. This bar has openings 19 at the straight end thereof for passage of a V retaining rod 20, and at its forward or offset end is provided with a-threaded opening for The, bar 18 is attached as shown in RFigFG, withthe retaining rod 2-0 extending across the side of the trap opposite the port 2 in such manner as to pre- 7 vent the withdrawal of the bar 18, the screw 5 being-threaded down against the plate 3 in the manner already described.

There may be still other modifications 1,ess,171

without departure from the essential features of the invention.

I claim:

A trap comprising a U-shaped' section having an opening therein, a convex closing plate adapted to lie over said opening to effectively close the latter, said plate having at least one concentric line of relative weakness on which the plate may be fractured to decrease the diameter, and a clamp for securing theplate'in closing position ineluding a trap-embracing member, a bar anchored by said embracing member and having end parts adapted to be'broken away to decrease'the length thereof, andascrew threaded in the bar and adapted to bear against the said plate.

HARRY o. ZIMMERMAN. 

